is the heartwood of the logwood tree, Haematoxylon campechianum.
It yields deep, rich, red purples to orchid blues and has been prized as a dyestuff since the 16th century.
The logwood tree grows in Mexico, Central America, Dominican Republic, Venezuela, Brazil, the Guyannas, Madagascar, and India.
Mixed with iron, logwood gives good blacks – a colour difficult to achieve with natural dyes.
Logwood has good washfastness but moderate lightfastness – a bit of iron improves the lightfastness dramatically.
Logwood chips will give a medium depth of shade at 10-15% WOF.